0.21.0

Enhancements

• Add button to double heap size on OOM. See #718.
• CodeAction for cvc-elt.1.a. See #599.
• TextMate grammar for *.dtd files. See #313.
• CodeAction for cvc-complex-type.2.4.b. See lemminx#1218.
• Support folding for <!DOCTYPE. See lemminx#1213.
• Added folding setting to keep displaying the closing tag after folding. See lemminx#1209.
• Provide basic experimental formatter which supports invalid XML. See lemminx#1195, lemminx#1041, lemminx#1034, lemminx#679, lemminx#675, lemminx#305.
• Format with xml:space. See lemminx#826.
• Code action for SemicolonRequiredInReference. See lemminx#665.
• Improve XML formatter (option to have Tags in the same line). See lemminx#594.

Performance

• Cancel process of code action. See lemminx#1220.
• Parse of DOM document should be not done in a Thread. See lemminx#1216.
• Improve memory for DOM parser & XML scanner. See lemminx#1211, lemminx#1206.
• Wait a bit after change before sending diagnostics. See lemminx#1162.
• Implement codeAction/resolve & completionItem/resolve. See lemminx#941, lemminx#616.

Bug Fixes

• externalXmlSettings.xmlFileAssociations not used in getXMLSettings. See #698.
• DOCTYPE entities interfering with hover annotation display of tags / attributes. See lemminx#1212.
• Incorrect error range for cvc-identity-constraint.4.1. See lemminx#1210.
• Resolve uri as system with XML catalog. See lemminx#1199.
• Added permission check and window error message for LemMinx binary. See #695.
• After a tag is collapsed, the content of the entire tag cannot be deleted. See #690.

Build

• Use platform specific .vsix files, and package the lemminx binary into the .vsix. See #593.
• Fix native image build on Windows builders. See #721.
• Add LemMinX binary artifacts to release tab only on new changes. See #706.
• Automatically publish latest snapshot build on Release page. See #656.

Other

• Add DCO information to CONTRIBUTING.md. See #723.